/Engine/Source/Runtime/OpenGLDrv/Public/OpenGLDrv.h
Remember what RHI user wants set on a specific OpenGL texture stage, translating from Stage and TextureIndex for stage pair.
void InternalSetShaderTexture ( [FOpenGLTexture](API\Runtime\OpenGLDrv\FOpenGLTexture) * Texture, [FOpenGLShaderResourceView](API\Runtime\OpenGLDrv\FOpenGLShaderResourceView) * SRV, GLint TextureIndex, GLenum Target, GLuint Resource, int NumMips, int LimitMip )